Fortune reports Wednesday that finanical analyst firm Piper Jaffray has just completed its twice annual survey of teens and found the iPhone ranks high on their wish lists, with already a significant adoption rate in the device’s 14 or so months on the market here in the US.

The survey of 769 high school students found that 8 percent already own the device, with another 22 percent expecting to purchase the phone within the next six months.

Such data has to be music to AT&T’s ears, considering the carrier is the exclusive partner for Apple here in the US. Piper Jaffray did not ask which carriers the teens were using, so it’s a little difficult to judge how this would affect AT&T’s subscriber numbers, although I’d guess they would get a modest bump in the least.

But like everything else we’ve talked about lately, teen’s wants and desires may not necessarily match up with what their parents can afford. With the economy the way it is, its also quite possible many of those who want the device may not have the means to obtain it, at least in the short term.

In addition to the data on iPhones, Piper Jaffray also found that 84 percent of teens owned an iPod, up 2 percent from last year. And of the four in ten who download music leagally, 93 percent were using iTunes, up significantly from the last survey.